<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>新浪图片切换</title>
    <style>
        *{
            margin:0;
            padding: 0;
        }
        #total{
            width: 340px;
            height: 300px;
            background-color: #99ff99;
            margin: 10px auto;
        }
        #div01{
            width: 170px;
            height: 300px;
            background-image: url("../imagconman/left.png");
            display: inline-block;
        }
        #div02{
            width: 170px;
            height: 300px;
            background-image: url("../imagconman/right.png");
            float: right;
        }
    </style>
    <script>
        window.onload=function () {
            var div01=document.getElementById("div01");
            var div02=document.getElementById("div02");
            var total=document.getElementById("total");
                total.style.backgroundImage="url(../imagconman/2020318.png)";
                total.style.backgroundRepeat="no-repeat";
            var imgArr=["../imagconman/2020318.png","../imagconman/荷花.png","../imagconman/向日葵.png","../imagconman/蝗虫.png"];
            var index=0;
            div01.onclick=function () {
            // alert("上一页");
                index--;
                if (index<0){
                    index=imgArr.length-1;
                }
                // console.log("url("+imgArr[index]+")")
                total.style.backgroundImage="url("+imgArr[index]+")";
            };
            div02.onclick=function () {
                // alert("下一页");
                index++;
                if (index>imgArr.length-1){
                    index=0;
                }
                total.style.backgroundImage="url("+imgArr[index]+")";
            };
        }
    </script>
</head>
<body>
<div id="total">
    <div id="div01"></div>
    <div id="div02"></div>
</div>
</body>
</html>